Effect of different environmental factors on SOD activity, MDA and soluble protein contents of wheat leaves

The growth and SOD activity,MDA and soluble protein contents of wheat leaves at seedling stage were determined in simulating soil basin culture,with controlled copper content (Cu: 400 mg/kg in dry soil and background soil),irrigated water (at 70% and 35% of soil capillary water) and fertilization (CK,N and NP).The results indicated that:(1) The level of water,fertilization and copper had notable effects on wheat growth,and the effect degree was waterfertilizationcopper.(2) Water had greater effect on MDA content than fertilization and copper,and drought stress obviously increased the MDA content and MDA/SOD values.(3) Water and copper had greater effect on SOD activity and soluble protein content.Drought stress increased SOD activity,decreased soluble protein content,and copper stress increased soluble protein content.(4) There existed interaction on wheat growth among the three different environmental factors.